Posts Tagged ‘ R-english ’

How to simulate wind speed time series with R

November 2, 2010
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How to simulate wind speed time series with R

If you need to generate synthetic wind speed time series, you may find useful the procedure described in  “A Markov method for simulating non-gaussian wind speed time series” by G.M. McNerney and P.S. Veers (Sandia Laboratories, 1985), and “Estimation of extreme wind speeds with very long return periods” by M.D.G Dukes and J.P. Palutikof (Journal

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A million ? what are the odds…

October 27, 2010
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A million ? what are the odds…

50 days ago, I published a post, here, on forecasting techniques. I was wondering what could be the probability to have, by the end of this year, one million pages viewed (from Google Analytics) on this blog. Well, initially, it was on my blog at t...

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Margin of error, and comparing proportions in the same sample

October 15, 2010
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Margin of error, and comparing proportions in the same sample

I recently tried to answer a simple question, asked by @adelaigue. Actually, I thought that the answer would be obvious... but it is a little bit more compexe than what I thought. In a recent pool about elections in Brazil, it was mentionned in a ...

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Studying joint effects in a regression

October 7, 2010
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Studying joint effects in a regression

We've seen in the previous post (here)  how important the *-cartesian product to model joint effected in the regression. Consider the case of two explanatory variates, one continuous (, the age of the driver) and one qualitative (, gasoline ve...

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New version of solaR

September 30, 2010
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New version of solaR

The version 0.2 of the solaR package is now available at CRAN. This package provides a set of calculation methods of solar radiation and performance of photovoltaic systems. The package has been uploaded to CRAN under the GPL-3 license. The most important changes included in this version are: The package is now almost entirely designed

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